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    <title>Document</title>

    <style>
        table{
            width: 50%;
            border: 1px solid black;
            margin: 0 auto;
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        td{
            border: 1px solid black;
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            text-align: center;
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        tbody>tr:nth-child(odd){
            background-color: chartreuse;
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<body>

    <table>
        <thead>
            <tr>
                <td>课程名称</td>
                <td>html</td>
                <td>css</td>
                <td>javascript</td>
                <td>vue</td>
            </tr>
        </thead>

        <tr>
            <td>学生1</td>
            <td>91</td>
            <td>92</td>
            <td>93</td>
            <td>94</td>
        </tr>
        <tr>
            <td>学生2</td>
            <td>91</td>
            <td>92</td>
            <td>93</td>
            <td>94</td>
        </tr>
        <tr>
            <td>学生3</td>
            <td>91</td>
            <td>92</td>
            <td>93</td>
            <td>94</td>
        </tr>
        <tr>
            <td>学生4</td>
            <td>91</td>
            <td>92</td>
            <td>93</td>
            <td>94</td>
        </tr>
        <tr>
            <td>学生5</td>
            <td>91</td>
            <td>92</td>
            <td>93</td>
            <td>94</td>
        </tr>
        <tr>
            <td>学生6</td>
            <td>91</td>
            <td>92</td>
            <td>93</td>
            <td>94</td>
        </tr>
        <tr>
            <td>学生7</td>
            <td>91</td>
            <td>92</td>
            <td>93</td>
            <td>94</td>
        </tr>
        <tr>
            <td>学生8</td>
            <td>91</td>
            <td>92</td>
            <td>93</td>
            <td>94</td>
        </tr>
        <tr>
            <td>学生9</td>
            <td>91</td>
            <td>92</td>
            <td>93</td>
            <td>94</td>
        </tr>
        <tr>
            <td>学生10</td>
            <td>91</td>
            <td>92</td>
            <td>93</td>
            <td>94</td>
        </tr>

    </table>



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